Timeline for Sampling Frequency of a pulsed radar signal
Current License: CC BY-SA 4.0
3 events
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| Jan 20, 2022 at 2:47 | comment | added | WhatRoughBeast | @SteveSh - Downconverting the return produces something very similar. It should be pretty clear that in order to reliably detect the return, the converted return must provide a full period within the pulse width. However, when sampling a downconverted return you actually do need at least two samples during the pulse width. That's the minimum required to reconstruct the pulse keeping the Nyquist limit in mind. | |
| Jan 10, 2022 at 19:57 | comment | added | SteveSh | None of the radars I'm familiar with use an analog front end to produce an envelope of the return. They use an analog front end to do signal conditioning, maybe some gain control, and (most importantly) mixing or down converting to create an intermediate frequency, usually I&Q in the hundreds of MHz range. This IF is then digitized and the rest of the processing and information extraction takes place in the digital domain. | |
| Jan 10, 2022 at 19:13 | history | answered | WhatRoughBeast | CC BY-SA 4.0 |